Apparatus for applying abrasive to polishing wheels



Sept. 9, 1930. J. s. PORTER APPARATUS Fon APPLYING ABRASIVE To PoLIsHINGWHEELS Filed July 16, 1928 6o therorsteehpusesaroundthesep PatentedSept. `9, 1930 UNITEDsrArI-:s PATENr OFFICE JOSEPH S. PORTER, Ol'PORTLAND, CONNECTICUT, ASSIGNOB TO D. H. 800m IN'- COBPORATED, OFHIGGANUM, CONNECTICUT, A CORPORATION QF CONNECTICUT APPARATUS FOB APPLmGABRASIVE TO .'POLISHING 'WHEELS Application med July 18, 1928.V SerialNo. 293,244.

i 1o tively inexpensive to build, simple to operate,

. and by means-of which the abrasive can' be rapidly applied in a mannerthat will ensure a coating of uniform density even thickness and ilatsurface on the peripheries and parallel with the axes of the wheels thatare treated thereby.

This apparatus has an endless belt that is moved beneath a hop er fromwhich granu- -lar abrasive is in the esired quantity allowed to escapeto the u per surface of the belt,

the ho per being dp ed to Keep the abrasive warm. There is a Areceptacle, referably electrically heated, containing esive, forinstance animal glue.

The wheel to be coated is held by a clamp that is rotatably mounted atthe end of an arm so pivoted that the wheel may be swung overto aposition adjacent to the adhesive re- Y ceptacle in order that theoperative -may apply theadhesive to the peri heral surface of the wheland then swing ack and pressed upon and allowed to roll on the travehngbelt carrying .1. the abrasive until the desired amount of abrasive isgathered by the adhesive. The wheel is then removed .and placed in anoven and dried, these steps be- `mg repeated until the abrasive coatingon the 4peri he of the wheel has reached the reggiredpthilciness anddensity.

the accompanying drawings .Fl` 1 shows a side elevation of theapparatus. 1g 2 is a view looking down on the apparatus with parts insection. Fig. 3 shows a section of the abrasive holding hopper. 4Supported in suitable bearings at one end of the apparatus is a shaft 1attached to which is a driving pulley 2. A t the other end is a shaft 3loose on which .is a driven plley 4. An endless belt 5, which ma be eys.

esirably electrically heat-- material of a different degree of The shaft3 is mounted in the upper ends of angle arms 6 which are pivoted insupports 7 and are engaged by springs 8 in such manner as to keep thebelt under proper tens1on. m

Fixed on the shaft 1 is a gear 9 that is engaged by a pinion A10 on anarbor 11 carrying a worm wheel 12 which is en aged by a worm 13 drivenby a motor 14. l en the motor is in action the Worm, worm wheel, pinionand gear rotate the driving pulley which gives the belt a slow travel.

Sup orted over the belt near the driving end o the apparatus is a hopper15 for receivmg the granular abrasive. The hopper shown is dividedvertically into two compartments by a casing 16 which may contain waterand which is provided with electrical heating units 17 for the purposeof warming the abrasive. Near the bottom of the hopper is a vhorizontalpartition 18 with openings 19 through which the abrasive may flow fromthe upper compartments into spaces 20 at .the bottom of the hopper.Through the bottom of the hopper are slots 2l which permit the escape ofabrasive from the spaces 20 onto the belt.

Rods 22 are provided for closing the openings 19 andstoppin the downwardflow of abrasive. These r s are loosely supported and at their upperends are pins 23. If a rod is lifted and is turned sothat its pinwillrest upon the to of the water jacket an opening 19 is left ree forI theescape of abrasive. When a rod is turned so that. its pin is disengagedfrom the top of the water jacket it will dro into an opening 19 and stoplthe flow of a rasive.. By separating the hopper into two compartmentsabrasive material of one ineness may be kept in one, and abrasiveiineness or character may be kept in the other, allowing the apparatusto be readily used for feeding adhesive havin grains of the desiredquality and size to the lt.

On a support 24 at the other end of the apparatus Js-a receptacle 25 forcontaining t e adhesive. This receptacle is desirably set in a casing 26that may contain water and which may be heated by an electrical heatinglo.

"shaft 3 is an arm 30 which atits free end has a pin S19-that extendsforwardly over the belt. l Loose on this pin is a sleeve 32. Fas'-tened. to the rear endof this sleeve is a clamp ldisk 33and adjustableonthefront end of the sleeve is a clampA disk 34 that isheld in position.by a nut 35which is turned upon the cuickly applied to the e and itsdensity well aratus la coating of abrasive of i the wheel rotates withthe movement of the belt the peripheral surface is evenly coated, and asthe axis of the wheel is. arallel with the plane of the belt andthe platorm beneath the belt, the face of the abrasive coating" that is formed,on the periphery of lthe' wheel is smooth'and flat and at all pointsequally disthreaded 'front end of the sleeve. The wheel tant from theaxis, thus ensuring accurate to betreated isslipped upon the sleeve andthen clamped between the disks by the nut. By means of thecrankhandlethe arm may be swung so as to carry the wheel fromv above thebelt, the position illustrated 'in full line inJ Fig. 1, to a ositionadjacent tothe adhesive receptac e, as indicatedby the dotted lines inthat ligure.

Below the belt and beneath the operative l position of the wheel is aplatformv 36 and pivoted to the crank handle is a foot 37 that may beturned down sofas to'rest on'the top of the platform when it is desiredto hold the wheel above and out of contact with the belt. Adjacent toand below the driven pulley is areceptacle 38 for receiving suchabrasiveas is not picked up from the belt by the adhesive on the wheel, andextending from the adhesive casing to aposition above the belt is ashield 39 Iwhich is designed to catch any dripof adhesive from the wheelwhen the adhesive is applied to the periphery thereof.

In use a wheel clamped on the arm is lirst swung adjacent .to thevadhesive receptacle and 1n this .position the operative witha brush orother suitable means coats its periphery with adhesive. /The wheel isthen swung back onto the traveling belt and the adhesive allowed tovcollect abrasive therefrom, the wheel being rotated by the movement ofthe belt so'that its whole periphery is coated. The operative by meansof the crank handle maypress the wheel down into the abrasive if desiredto ensure the necessary density of the abrasive picked up by theadhesive on the periphery of the wheel. When 'a sufficient quantity ofabrasive has been collected by the adhesive on the periphery of thewheel the nut is unscrewed, the outer clamp plate taken off and thekwheel removed and placed in an oven for drying.

After the coating has \beeny suiiiciently baked the wheel may again belocated on the arm and coated with adhesive and then al lowedto pick upan additional layer of abrasive,v These steps may be repeated asoften asdesired until the coating of abrasive on the periphery ofthe wheel hasreached the desired thickness and density. Whenonewheel is being driedanother wheel may be treated by theapparatus so that there is no losttime.

grinding or polishing of the article which. is subjected to the actionof the wheel thus produced. l j

The invention claimed is:

1. An apparatus of the character comprising an endless belt, mechanismfor described comprising an endless fbelt, mechanism for .impartingmovement to the belt, means for depositing abrasiveon the upper surfaceof the belt, an oscillatory arm, means for oscillating said arm, a pinextending from said arm over and parallel withthe upper'surface. ofthebelt, a sleeve rotatable on. saidpin, a

clamp disk fixed to said sleeve, a clamp disk detachably mounted on saidsleeve, means for securing said-detachable disk on said wheel, and aplatform b elow the belt'and' beneath said clamp disks- 'i 3. Anapparatus of the character described comprising an endless belt,mechanism for y imparting movement to the belt, means for depositingabrasive on the upper surface of the belt, an adhesive receptacle,anoscillatory arm, a` wheel holding clamp rotatably mounted on said arm,means .for oscillating said arm and swinging said clamp between theadhesive receptacle and the upper surface of the'belt, and a platformbelow the belt and beneath 'said clamp.

4. An apparatus of the character described comprising an endless belt,mechanism for imparting movementA to the belt, a hopper adjacent one endof the belt for depositing abrasive on vthe upper surface of the belt,

electrical means for heating said hopper, an adhesive receptacleadjacent the other end of the belt, electrical means for heating saidreceptacle, an oscillatory arm, a wheel holding clamp rotatably mountedon said arm, means for oscillating said arm and swin ing a wheel held bysaid clamp between te adhesive receptacle and into engagement with theupper surface of the belt and causlasv B5 p imparting movement, tothe'belt, a hopper ing the wheel to rotate by frictional engagement withthe belt, and a platform below the belt and beneath said clam v 5.Apparatus for applying a rasive to the peripheral surface of a grindingor polishing wheel comprising a frame, pulleys adjacent the ends of theframe, an endless belt running over said pulleys, means for depositingabrasive on the belt, oscillatory means for clamping the wheel to betreated with its axis extending across and parallel with the uppersurface of the belt, means for swinging said clamping means and causingthe peripheral surface of the wheel to engage with and be rotated byfrictional contact with the belt, and a stationary table beneath thelocality of contact of the wheel with the belt. 6. Apparatus forapplying abrasive to the peripheral surface of a grinding or polishing lwheel comprising a frame, pulleys adjacent the ends of the frame, anendless belt running over said pulleys, means for depositing abrasive onthe belt, freely rotatable means for clamping the wheel to be treatedwith its axis extending acrossand parallel with the upper surface of thebelt, means for swinging said clamping means and causing the peripheralsurface of the wheel to engage with and be rotated by frictional con-`tact with thel belt, and a stationary table beneath the locality ofcontact of the wheel with the belt.

7. Apparatus for applying abrasive to the peripheral surface of agrinding or polishing wheel comprising a frame, pulleys adjacent theends of the frame, an endless belt running over said pulleys, a hopper:for depositing abrasive on the belt, electrical means for heating saidhopper, freel rotatable means 40 for clamping the wheel to e treatedwith its axis extending across and parallel with the upper surface ofthe belt, means for swinging said clamping means and causing theperipheral surface of the wheel to engage with p and be rotated byfrictional contact with the belt and a stationary table beneath thelocality of contact of the wheel with the belt.

8. Apparatus for applyin Aabrasive to the peripheral surface of a grining or polishing 5 wheel comprising a frame, pulleys adjacent the endsof the frame, an endless belt running over said pulleys, means fordepositing abrasive on the belt, a clamp for gripping the wheel to betreated, said clamp being rotatably mounted on an oscillatory axle thatextends across and parallel with the plane of travel of the uppersurface of the belt,- means for swinging said axle and clamp to- 4wardand from the belt, and a stationary 3" table extending beneath the upperlength of the belt.

JOSEPH S. PORTER..

